<style>
    tr{line-height: 30px;}
    #deviceHistory td{
        text-align: center;
        border-width:0 1px 1px 0;
        border-style:dotted;
        border-color:#ddd
    }
    html,body{
       background-color: #fff;
    }
</style>
<table style="max-width:1000px" id="deviceHistory" class="table table-bordered">
    <tr style="border-bottom: solid 1px #ddd" bgcolor="#f0ffff">
        <td style="width: 120px">入学年份</td>
        <td style="width: 120px">学校</td>
        <td style="width: 120px">班级</td>
        <td style="width: 200px">注册时间</td>
        <td style="width: 200px">转入时间</td>
        <td style="width: 200px">转出时间</td>
    </tr>
</table>


